Angle-cock device



Nov. 19, 1929. I c, c, FARMER- 7 1,736,000

ANGLE COCK DEVICE Filed April 9. 1928 INVENT'OR CLYDE c. FARMET-l BY%IIWW ATTORNEY Patented Nov. 19, 1929 CLYDE c. FARMERQQF PITTSBURGH, @ENNSYLVAZNIA, AsszeNoR are FTJHEAWESTING- EOUSE'LAIRZBRAKE COMPANY, on WILMERDING;:PENNsYnvANIA, e conroammron,

, on PENNSYLVANIA a nNenn c'oox DEVICE Application filed April 9, 1928. Serial No. 268,475.

Ehis invention relates [to fluid pressure brakes and more particularly to an (angle rota manually'operated vent valve.

cock device, suchas employed to control communicationtlirough the-brake pipe of a fluid pressure brake system.

An objectjof my invention is to provide novel means for controlling the flow of air through the -angle cock device, so that an unrestricted passage through the device will be had at all times, except upon the opening Another object of the invention is theprovisionof a plunger valve for Econtrollingthe -flo'w ofrjair through the angle cock, normally held ofi its seat. u-ntler the j nfluence of a spring,with meansincluding a pressure controlled piston operated slide; valve for govier 'ning-the;-fiow offluid'unde'r pressure against saidiplunger valve formovingthe same-to its seat against said spring, actuationof the piston being caused by; frelease of pressure .ronrone sidethereof by the opening ofa maniially 'operated vent valve.

- J A furtherobject of-theinventionis to vide a fluid pressure operated angle cockdevice,fwl1ich wlllbe sensitive toa variation in fluid-pressure and which will act substantially instantaneously upon'a, variation in v fluid pressure, said variation infiuid pressure being-controlle'd'bya=manually operated vent valve. V ,7 a

A st1ll further "ob ect of the; invention 13 "to provide a pressure :operated angle cock device embodying a plunger valve for [controlling the flow 'ofgair, through the device, said plunger valve having associated therewith "a pair of'opp'osed diaphragms "subject to pressure for closingzt'he valve, the pressin'e fly controlled vent valve, p

In the accompanying drawing, the single I being co'ntiolled by .a :pistonaoper'ated slide Valve, 'which is in turn actuated byt-here'lease of'ipressure ononesidethereo'f by a manualfig'ure is a'diagram'matic sectional view of an 7 ali'gl'e cock' deviee 'embodying my invention;

The angle cock device may comprise a casing l'havin'g a -passageway 2 to which 18 c'onnectedthe usualbralz'e pipe 3 and 'a passageway 'c to which'is connect-ed the usual flexible hose 5.

' valve can provided 12, 13 and 14. 1 4 v Spaced diaphragms =15and, 1 6 are mounted the chamber 10 and may be provided Interpo sed between the passageways g, and 4: is an annular valve rib seatdpnwhic h is adapted to seat the inner face of a plunger valve 7 The inner face of this plunger with a set-in washer, disk 8-for engaging theseatif desir edl 1 As shown in tlieipresentillustration of the invention, the casing is provided withail aterally extending body. 9jhaving'formed cen-.

tra lly therein a pair. of alignedcommunieating chambers 10and 11 of.

a a I V clifferent-areas 3 right l l l'lyx endin ommunicat-j mg slide valve, piston and springchambers respectively in;thejehambers l O'andjl l and it''isto be noted that the diaph ragin ltriisof greater :area tlie ldiaphragm 15;

outer end of the-plunger valve}? extends. into 4 A I W an enlarged head for; engaging one fagce of the diaphragm l5. a

plunger valve and bears against the head -.l7

thereof and'the innerlend wall ofthechamber 10. This spring 18 Qnormallydunctionsj=to" hold the valve oil of its seat toallow iree communication to be had betweenpassage- Ways 2 and 4E. It-is well to=note=atthis,point that-asm'all passage 39 connects the passage i Way 2 with the'chamber 10.

7 A double headed fol-lower 1-20 is disposed 1 between the di'aphragms 15 'and l-tiyso movement of one-will be co nmun-ieated to the other, "A follower 21 is disposedin =the chamber 11, between the diaphragn and the end wall; of the chamber -1-;1-,-to the movement of this diaphragm in .onedirectiQIl. 4 i V .i. a A restricted passage 22 is formed in the body and connects the apassageway-g with the slide valve chamber l2, and a similar 'passage 23 connects the 'spring -ehamber -14 with the passageway 4., ;A ,portf24l conn tfth 7 provided with a stem 27 which extends into the slide valve chamber 12.

This stem carries a slide valve 28, which fits against a flat face formed on'the wall of thechamber. The

slide valve 28 is provided respectively with a port 29 which extends entirely through the same and a cavity 30 in its lower face. It can be seen that when the slide valve is in one of its positions the port 29 will align or register with the port 24:for establishing communication betweenchambers 11 and 12 v and when the slide valve 28 is in its other position, the cavity 30 connects port 24L with Y the piston is in the atmospheric port 25, thereby connecting chamber ll with the atmosphere on one side of the diaphragm 16. I Y

The spring chamber 14 at one end is provided with an escape or vent port 31 havingfa valve seat on which is normally held,

throughthe medium of an expansion spring 32, an escape or vent valve 33. g This valve 1 33 is provided with'a fluted stem which extendsexteriorly of the body,

to permit the manual actuation of the vent valve.

I It is to be noted that the piston 26 has its outer face provided with a seat rib 3a which is adapted to'fit against a' sealing washer 35' when the piston is in its outermost position. An expansion spring 36; bears against the face of" the piston and functions to move thepiston inward, under certain conditions,as will be later described. WVhen its inward, position, communication is established between chambers 12 a and 13 through the medum of a short groove 37 formed in the wall of the cylinder chamher 13 at the inner end'thereof.

Under normal conditions, the fluid pressures on oppositesides of the piston 26 are equal, due to the passages 22 and 23, and

' the spring 36 holds the piston in its inward spring V Th sallows cock device.

position, which connects port24 with atmos- J pheric'port V ""slid evalve 28.;

25, through the medium of the air in chamber 10 and the resiliency of the 18 holds the valve 7 off of its seat. free flow of air through the angle When "it is desired to disconnect pair of cars fitted with the improved angle cocks, thevent valvesi33 on the adjoining cars are pressed inward." The fluid pressure'in the spring chamber 14 then reduces faster than it canbe built up by flow from the brake pipe, and the pressure on the inner side of the piston 26 moves the piston and attached I slide valve 28 outwardly until the piston seals against its atmospheric seal 35. The port 24 leading from-the upper face of the diais then cut oif from the atmos- 25 and is connected with the chambra'ke pipe pressurethrough slide phragm 16 pheric port ber 12 and valve port29. [The area then exposed to' the brake'pipe pressure of the outer diaphragm '16 is greater than that of the inner diaphragm inward, cutting Consequently the pressure of soon as the pressure inthe empty car equalizes with that on the train,-the piston spring 36 forces the piston 26 and slide valve 28 outer diaphragm 16 and opening its chamber to. the atmosphere, permitting the 'valve spring 18 to open the valve 7. 7

The space between the diaphragms15 and; 16 is connected to the atmosphere by means of a passage 39 to eliminate any effects of leakage of air past the diaphragms. In reoff the supply of air to the charging an empty car, the end hose cou- V pling can be provided with a dummy coupling, to prevent escape of air under pressure therethrough: r v r v While one illustrative embodiment of the invention has been described in detail, it is not my intention to limit its scope to that 1 embodiment or otherwise than by the terms of the appended claims.

Having now described my invention, what I im as new and desire to secure by Lett Patent, is-':' V

1. An angle cock device comprising a casing having a main passageway therethrough,

a normally open valve for controlling the flow 'of'air through said passage, means for I seating said valve by pressure,and means for s to said prescontrolling the flow of pressure sure 'operate'd means including a piston operated slide valve. I

. 2. An angle cook a normally open valve for controlling the flow of air throughsaid passage, a diaphragm for normally moving the valve on its seat when sub ected to pressure, and means for con 'trolling'the flow of pressure to said dia-' 'phragm.

3. An angle cock device comprising a (was ing having a' 1112111 passageway therethrough,

device comprising acasinghaving a main passageway therethrough,

a valve for controlling .the flow of air through an inner and outer dia phragm of different areas, means for communicating movement of one diaphragm to the other and to said valve, said casing having a port connecting the passageway with" the diaphragm of less area for normally per said passageway,

closing said valve against the pressure on the diaphragm of less area. p f

mitting unseating of said valve, and 'pres-' sure operated means for controlling the flow of air to the diaphragm'of greater'areaafor 4. An angle cock device comprising a casing having a main passageway therethrough, a valve for controlling the flow of air through said passageway, an inner and Outer diaphragm of 'diflerent areas, means for communicating movement of one diaphragm to the other and to said valve, said casing having a port connecting the passageway with the diaphragm of less area for normally permitting unseating of said valve, means subject to brake pipe pressure for controlling the flow of air to the diaphragm of greater area for closing said valve against the pres sure on the diaphragm of less area, and a manually operable valve for venting fluid under pressure from said air controlling means. 7 I g V 5. An angle cock-device comprising a casing having a main passageway therethrough, V

a valve for controlling the flow of air through said passageway, an inner and 'outer diaphragm of different areas, means for communicating movement of one diaphragm to -the other and to said valve, said casing having a port connecting the passageway with the diaphragm of less area for normally permitting unseating of said valve, a brake pipe pressure controlled piston ac tuated slide valve for controlling the flow of air to the diaphragm of greater area lhe diaphragm of less area for normally per mitting unseating of said valve, a brake pipe pressure controlled piston actuated slide valve for controlling the flow of air to the diaphragm of greater area for closing said valve against the pressure on the diaphragm of less area, and a manually operated valve for venting fluid under pressure from said piston, and a normally open choke passage around said first mentioned valve.

7 An angle cock device comprising a casing having a main passageway therethrough, a valve subject to brake pipe pressure for controlling the flow of air through said passageway, means normally tending to hold the valve off of its seat, means subject to brake pipe pressure for controlling the flow of air under pressure to said valve for moving the valve on its seat, and a manually operable valve for venting fluid under pressure from said brake pipe pressure controlling means.

valve. a

In testimony whereof I have hereunto set a 3 p I a a valve for controlling the flow of air through said passageway, an inner and outer diaphragm'of different areas, means for communicating movement of one diaphragm to the otherand to said valve, said casing having a: port connecting the passageway with the diaphragm of less area for normally permitting unseating of said valve, a brake pipe pressure controlled piston actuated slide valve for controlling theflow of air to the, diaphragm of greater area for closing said valve against the pressure on the'diaphragm of less area, and a manually operated valve for venting fluid under pressure. from said piston, and an atmospheric seal for said piston upon movement of the piston actuated slidevalve upon, actuation of the operated vent valve.

9. An angle cock device comprising a case ing having a main passageway therethrough, valve means subject to brake pipe pressure for controlling the flow of air through said main passageway, means normally tending manually to move the valve in one direction ofi' of its seatpsaid casinghaving a chamber disposed. at one end of the valve, a piston operated slide valve in said chamber for controlling the flow of brake pipe pressure to the valve and for venting pressure from the valve to the atmosphere, said casing having a by-pass connecting the opposite ends of the chamber with the main passageway on each side of,

said valve, whereby pressure on the opposite ends of the piston operated slide valve will be normally equalized, and a manually operated valve for venting fluid under pressure from one side of said my hand.

' CLYDE C. FARMER.

8. An angle cock device comprising a cas 7 ing having a main passageway therethrough,

piston operated slide 

